On 5/21/2013 10:26 AM, Michael Farmer wrote:
> Jim, there are shock veins and slickensides. They are not the same
thing. They
are result of shock but not melting like the full melt veins are.
> I have hundreds of pieces with slickensides. I am traveling so I
can't show
photos.
> Perhaps later.
> Michael Farmer
>
> Sent from my iPhone
>
> On May 21, 2013, at 12:19 PM, Jim Wooddell
<jim.wooddell at suddenlink.net>
wrote:
>
>> Hi Jim Baxter,
>> And, that is what I am not seeing. I'am going to be a very hard
sell on the
term slickensides until I see something that scientifically supports it
and why
it is there. Do the threads actually appear and are they threads??
>> In my mind, the coming apart part would not create a slickenside
(cool state)
where as the coming together with great pressure and time would. Just
thinking
out loud, not qualified to say one way or the other!
>> I also see where this appearance is shown lower in topography in
it's area
which, to me, would be odd for slickenside.
>>
>> Cheers!
>>
>> Jim Wooddell
>>
>>
>>
>>
>> On 5/21/2013 9:18 AM, Jim Baxter wrote:
>>> Slickensides are polished surfaces caused by lateral movement along
a fault
plane. In hand specimens they feel rough when you rub your finger in
one
direction and smooth when you rub it in the other. Not sure that test
would be
feasible on the size specimens most of us own. In theory if the fault
planes
represent planes of weakness along which breaks occur then you could be
seeing
both things - slickensides that formed by lateral movement along the
shock plane
when the stone fractured.
>>>
>>> Jim Baxter
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